From 185feb5a2cbe600d0216b4209d20fa0d2ec551b8 Mon Sep 17 00:00:00 2001
From: Test <test@test.com>
Date: Mon, 2 Mar 2026 18:38:25 +0100
Subject: [PATCH] =?UTF-8?q?feat:=20raw=20editor=20mode=20=E2=80=94=20plain?=
 =?UTF-8?q?=20textarea=20with=20frontmatter=20+=20wikilink=20autocomplete?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Adds a third editor mode (alongside WYSIWYG and Diff) that shows the raw
markdown file in a monospaced textarea. Includes:

- useRawMode hook with derived state (no setState-in-effect) and onFlushPending
- RawEditorView: textarea with 500ms debounce, YAML error banner, wikilink
  autocomplete via [[  trigger, Cmd+S save
- BreadcrumbBar Code icon toggles raw mode; mutual exclusion with diff mode
- Command palette: "Toggle Raw Editor" (View group, requires active tab)
- useEditorModeExclusion hook extracted to keep Editor.tsx under complexity threshold
- buildViewCommands extracted from useCommandRegistry for same reason
- RawToggleButton and RawModeEditorSection components extracted for clean CC

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 design/raw-editor-mode.pen            |   1 +
 src/App.tsx                           |   6 +
 src/components/BreadcrumbBar.test.tsx |  21 ++
 src/components/BreadcrumbBar.tsx      |  20 ++
 src/components/Editor.tsx             |  46 ++++-
 src/components/EditorContent.tsx      |  46 ++++-
 src/components/RawEditorView.test.tsx | 143 +++++++++++++
 src/components/RawEditorView.tsx      | 276 ++++++++++++++++++++++++++
 src/hooks/useAppCommands.ts           |   2 +
 src/hooks/useCommandRegistry.test.ts  |  30 +++
 src/hooks/useCommandRegistry.ts       |  38 +++-
 src/hooks/useRawMode.test.ts          |  87 ++++++++
 src/hooks/useRawMode.ts               |  29 +++
 src/utils/rawEditorUtils.ts           |  21 ++
 14 files changed, 750 insertions(+), 16 deletions(-)
 create mode 100644 design/raw-editor-mode.pen
 create mode 100644 src/components/RawEditorView.test.tsx
 create mode 100644 src/components/RawEditorView.tsx
 create mode 100644 src/hooks/useRawMode.test.ts
 create mode 100644 src/hooks/useRawMode.ts
 create mode 100644 src/utils/rawEditorUtils.ts

diff --git a/design/raw-editor-mode.pen b/design/raw-editor-mode.pen
new file mode 100644
index 00000000..747b5ab3
--- /dev/null
+++ b/design/raw-editor-mode.pen
@@ -0,0 +1 @@
+{"children":[],"variables":{}}
diff --git a/src/App.tsx b/src/App.tsx
index d3ce21de..8408591b 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -270,6 +270,9 @@ function App() {
 
   const bulkActions = useBulkActions(entryActions, setToastMessage)
 
+  // Raw-toggle ref: Editor registers its handleToggleRaw here so the command palette can call it
+  const rawToggleRef = useRef<() => void>(() => {})
+
   const { setViewMode, sidebarVisible, noteListVisible } = useViewMode()
   const zoom = useZoom()
   const buildNumber = useBuildNumber()
@@ -290,6 +293,7 @@ function App() {
     onArchiveNote: entryActions.handleArchiveNote, onUnarchiveNote: entryActions.handleUnarchiveNote,
     onCommitPush: commitFlow.openCommitDialog, onSetViewMode: setViewMode,
     onToggleInspector: () => layout.setInspectorCollapsed(c => !c),
+    onToggleRawEditor: () => rawToggleRef.current(),
     onZoomIn: zoom.zoomIn, onZoomOut: zoom.zoomOut, onZoomReset: zoom.zoomReset,
     zoomLevel: zoom.zoomLevel,
     onSelect: setSelection, onCloseTab: notes.handleCloseTab,
@@ -389,7 +393,9 @@ function App() {
             onUnarchiveNote={entryActions.handleUnarchiveNote}
             onRenameTab={handleRenameTab}
             onContentChange={handleContentChange}
+            onSave={handleSave}
             onTitleSync={handleTitleSync}
+            rawToggleRef={rawToggleRef}
             canGoBack={navHistory.canGoBack}
             canGoForward={navHistory.canGoForward}
             onGoBack={handleGoBack}
diff --git a/src/components/BreadcrumbBar.test.tsx b/src/components/BreadcrumbBar.test.tsx
index 85fcb7f8..9e867c54 100644
--- a/src/components/BreadcrumbBar.test.tsx
+++ b/src/components/BreadcrumbBar.test.tsx
@@ -115,3 +115,24 @@ describe('BreadcrumbBar — archive/unarchive', () => {
     expect(onUnarchive).toHaveBeenCalledOnce()
   })
 })
+
+describe('BreadcrumbBar — raw editor toggle', () => {
+  it('shows Raw editor button with tooltip "Raw editor" when rawMode is off', () => {
+    const onToggleRaw = vi.fn()
+    render(<BreadcrumbBar entry={baseEntry} {...defaultProps} rawMode={false} onToggleRaw={onToggleRaw} />)
+    expect(screen.getByTitle('Raw editor')).toBeInTheDocument()
+  })
+
+  it('shows "Back to editor" tooltip when rawMode is on', () => {
+    const onToggleRaw = vi.fn()
+    render(<BreadcrumbBar entry={baseEntry} {...defaultProps} rawMode={true} onToggleRaw={onToggleRaw} />)
+    expect(screen.getByTitle('Back to editor')).toBeInTheDocument()
+  })
+
+  it('calls onToggleRaw when raw button is clicked', () => {
+    const onToggleRaw = vi.fn()
+    render(<BreadcrumbBar entry={baseEntry} {...defaultProps} rawMode={false} onToggleRaw={onToggleRaw} />)
+    fireEvent.click(screen.getByTitle('Raw editor'))
+    expect(onToggleRaw).toHaveBeenCalledOnce()
+  })
+})
diff --git a/src/components/BreadcrumbBar.tsx b/src/components/BreadcrumbBar.tsx
index 80b63135..ee3af859 100644
--- a/src/components/BreadcrumbBar.tsx
+++ b/src/components/BreadcrumbBar.tsx
@@ -4,6 +4,7 @@ import { cn } from '@/lib/utils'
 import {
   MagnifyingGlass,
   GitBranch,
+  Code,
   CursorText,
   Sparkle,
   SlidersHorizontal,
@@ -22,6 +23,8 @@ interface BreadcrumbBarProps {
   diffMode: boolean
   diffLoading: boolean
   onToggleDiff: () => void
+  rawMode?: boolean
+  onToggleRaw?: () => void
   showAIChat?: boolean
   onToggleAIChat?: () => void
   inspectorCollapsed?: boolean
@@ -34,7 +37,23 @@ interface BreadcrumbBarProps {
 
 const DISABLED_ICON_STYLE = { opacity: 0.4, cursor: 'not-allowed' } as const
 
+function RawToggleButton({ rawMode, onToggleRaw }: { rawMode?: boolean; onToggleRaw?: () => void }) {
+  return (
+    <button
+      className={cn(
+        'flex items-center justify-center border-none bg-transparent p-0 cursor-pointer transition-colors',
+        rawMode ? 'text-foreground' : 'text-muted-foreground hover:text-foreground',
+      )}
+      onClick={onToggleRaw}
+      title={rawMode ? 'Back to editor' : 'Raw editor'}
+    >
+      <Code size={16} />
+    </button>
+  )
+}
+
 function BreadcrumbActions({ entry, showDiffToggle, diffMode, diffLoading, onToggleDiff,
+  rawMode, onToggleRaw,
   showAIChat, onToggleAIChat, inspectorCollapsed, onToggleInspector,
   onTrash, onRestore, onArchive, onUnarchive,
 }: Omit<BreadcrumbBarProps, 'wordCount' | 'noteStatus'>) {
@@ -68,6 +87,7 @@ function BreadcrumbActions({ entry, showDiffToggle, diffMode, diffLoading, onTog
           <GitBranch size={16} />
         </button>
       )}
+      <RawToggleButton rawMode={rawMode} onToggleRaw={onToggleRaw} />
       <button
         className="flex items-center justify-center border-none bg-transparent p-0 text-muted-foreground"
         style={DISABLED_ICON_STYLE}
diff --git a/src/components/Editor.tsx b/src/components/Editor.tsx
index 13f670bc..babec93a 100644
--- a/src/components/Editor.tsx
+++ b/src/components/Editor.tsx
@@ -9,6 +9,7 @@ import type { FrontmatterValue } from './Inspector'
 import { ResizeHandle } from './ResizeHandle'
 import { TabBar } from './TabBar'
 import { useDiffMode } from '../hooks/useDiffMode'
+import { useRawMode } from '../hooks/useRawMode'
 import { useEditorFocus } from '../hooks/useEditorFocus'
 import { EditorRightPanel } from './EditorRightPanel'
 import { EditorContent } from './EditorContent'
@@ -53,6 +54,7 @@ interface EditorProps {
   onUnarchiveNote?: (path: string) => void
   onRenameTab?: (path: string, newTitle: string) => void
   onContentChange?: (path: string, content: string) => void
+  onSave?: () => void
   /** Called when H1→title sync updates the title (debounced). */
   onTitleSync?: (path: string, newTitle: string) => void
   canGoBack?: boolean
@@ -61,6 +63,34 @@ interface EditorProps {
   onGoForward?: () => void
   leftPanelsCollapsed?: boolean
   isDarkTheme?: boolean
+  /** Mutable ref that Editor registers its raw-mode toggle into, for command palette access. */
+  rawToggleRef?: React.MutableRefObject<() => void>
+}
+
+function useEditorModeExclusion({
+  diffMode, rawMode, handleToggleDiff, handleToggleRaw, rawToggleRef,
+}: {
+  diffMode: boolean
+  rawMode: boolean
+  handleToggleDiff: () => void | Promise<void>
+  handleToggleRaw: () => void
+  rawToggleRef?: React.MutableRefObject<() => void>
+}) {
+  const handleToggleDiffExclusive = useCallback(async () => {
+    if (!diffMode && rawMode) handleToggleRaw()
+    await handleToggleDiff()
+  }, [diffMode, rawMode, handleToggleDiff, handleToggleRaw])
+
+  const handleToggleRawExclusive = useCallback(() => {
+    if (!rawMode && diffMode) handleToggleDiff()
+    handleToggleRaw()
+  }, [rawMode, diffMode, handleToggleDiff, handleToggleRaw])
+
+  useEffect(() => {
+    if (rawToggleRef) rawToggleRef.current = handleToggleRawExclusive
+  }, [rawToggleRef, handleToggleRawExclusive])
+
+  return { handleToggleDiffExclusive, handleToggleRawExclusive }
 }
 
 function EditorEmptyState() {
@@ -81,9 +111,10 @@ export const Editor = memo(function Editor({
   showAIChat, onToggleAIChat,
   vaultPath,
   onTrashNote, onRestoreNote, onArchiveNote, onUnarchiveNote,
-  onRenameTab, onContentChange, onTitleSync,
+  onRenameTab, onContentChange, onSave, onTitleSync,
   canGoBack, canGoForward, onGoBack, onGoForward, leftPanelsCollapsed,
   isDarkTheme,
+  rawToggleRef,
 }: EditorProps) {
   const vaultPathRef = useRef(vaultPath)
   useEffect(() => { vaultPathRef.current = vaultPath }, [vaultPath])
@@ -116,6 +147,13 @@ export const Editor = memo(function Editor({
   const { diffMode, diffContent, diffLoading, handleToggleDiff, handleViewCommitDiff } = useDiffMode({
     activeTabPath, onLoadDiff, onLoadDiffAtCommit,
   })
+
+  const { rawMode, handleToggleRaw } = useRawMode({ activeTabPath })
+
+  const { handleToggleDiffExclusive, handleToggleRawExclusive } = useEditorModeExclusion({
+    diffMode, rawMode, handleToggleDiff, handleToggleRaw, rawToggleRef,
+  })
+
   const isLoadingNewTab = activeTabPath !== null && !activeTab
   const activeStatus = activeTab ? getNoteStatus?.(activeTab.entry.path) ?? 'clean' : 'clean'
   const showDiffToggle = !!(activeTab && (diffMode || activeStatus === 'modified'))
@@ -149,7 +187,11 @@ export const Editor = memo(function Editor({
               diffMode={diffMode}
               diffContent={diffContent}
               diffLoading={diffLoading}
-              onToggleDiff={handleToggleDiff}
+              onToggleDiff={handleToggleDiffExclusive}
+              rawMode={rawMode}
+              onToggleRaw={handleToggleRawExclusive}
+              onRawContentChange={onContentChange}
+              onSave={onSave}
               activeStatus={activeStatus}
               showDiffToggle={showDiffToggle}
               showAIChat={showAIChat}
diff --git a/src/components/EditorContent.tsx b/src/components/EditorContent.tsx
index fa4fd049..2a90f040 100644
--- a/src/components/EditorContent.tsx
+++ b/src/components/EditorContent.tsx
@@ -2,6 +2,7 @@ import type { VaultEntry, NoteStatus } from '../types'
 import type { useCreateBlockNote } from '@blocknote/react'
 import { DiffView } from './DiffView'
 import { BreadcrumbBar } from './BreadcrumbBar'
+import { RawEditorView } from './RawEditorView'
 import { countWords } from '../utils/wikilinks'
 import { SingleEditorView } from './SingleEditorView'
 
@@ -19,6 +20,10 @@ interface EditorContentProps {
   diffContent: string | null
   diffLoading: boolean
   onToggleDiff: () => void
+  rawMode: boolean
+  onToggleRaw: () => void
+  onRawContentChange?: (path: string, content: string) => void
+  onSave?: () => void
   activeStatus: NoteStatus
   showDiffToggle: boolean
   showAIChat?: boolean
@@ -63,6 +68,28 @@ function DiffModeView({ diffContent, onToggleDiff }: { diffContent: string | nul
   )
 }
 
+function RawModeEditorSection({
+  rawMode, activeTab, entries, onContentChange, onSave,
+}: {
+  rawMode: boolean
+  activeTab: Tab | null
+  entries: VaultEntry[]
+  onContentChange?: (path: string, content: string) => void
+  onSave?: () => void
+}) {
+  if (!rawMode || !activeTab) return null
+  return (
+    <RawEditorView
+      key={activeTab.entry.path}
+      content={activeTab.content}
+      path={activeTab.entry.path}
+      entries={entries}
+      onContentChange={onContentChange ?? (() => {})}
+      onSave={onSave ?? (() => {})}
+    />
+  )
+}
+
 /** Bind an optional callback to a path, returning undefined if callback is absent */
 function bindPath(cb: ((path: string) => void) | undefined, path: string) {
   return cb ? () => cb(path) : undefined
@@ -70,7 +97,7 @@ function bindPath(cb: ((path: string) => void) | undefined, path: string) {
 
 function ActiveTabBreadcrumb({ activeTab, props }: {
   activeTab: Tab
-  props: Omit<EditorContentProps, 'activeTab' | 'isLoadingNewTab' | 'entries' | 'editor' | 'onNavigateWikilink' | 'onEditorChange'>
+  props: Omit<EditorContentProps, 'activeTab' | 'isLoadingNewTab' | 'entries' | 'editor' | 'onNavigateWikilink' | 'onEditorChange' | 'onRawContentChange' | 'onSave'>
 }) {
   const wordCount = countWords(activeTab.content)
   const path = activeTab.entry.path
@@ -83,6 +110,8 @@ function ActiveTabBreadcrumb({ activeTab, props }: {
       diffMode={props.diffMode}
       diffLoading={props.diffLoading}
       onToggleDiff={props.onToggleDiff}
+      rawMode={props.rawMode}
+      onToggleRaw={props.onToggleRaw}
       showAIChat={props.showAIChat}
       onToggleAIChat={props.onToggleAIChat}
       inspectorCollapsed={props.inspectorCollapsed}
@@ -98,19 +127,28 @@ function ActiveTabBreadcrumb({ activeTab, props }: {
 export function EditorContent({
   activeTab, isLoadingNewTab, entries, editor,
   diffMode, diffContent, onToggleDiff,
+  rawMode, onToggleRaw, onRawContentChange, onSave,
   onNavigateWikilink, onEditorChange, vaultPath, isDarkTheme,
   ...breadcrumbProps
 }: EditorContentProps) {
+  const showEditor = !diffMode && !rawMode
+
   return (
     <div className="flex flex-1 flex-col min-w-0 min-h-0">
-      {activeTab && <ActiveTabBreadcrumb activeTab={activeTab} props={{ diffMode, diffContent, onToggleDiff, ...breadcrumbProps }} />}
+      {activeTab && (
+        <ActiveTabBreadcrumb
+          activeTab={activeTab}
+          props={{ diffMode, diffContent, onToggleDiff, rawMode, onToggleRaw, ...breadcrumbProps }}
+        />
+      )}
       {diffMode && <DiffModeView diffContent={diffContent} onToggleDiff={onToggleDiff} />}
-      {!diffMode && activeTab && (
+      <RawModeEditorSection rawMode={rawMode} activeTab={activeTab} entries={entries} onContentChange={onRawContentChange} onSave={onSave} />
+      {showEditor && activeTab && (
         <div style={{ display: 'flex', flex: 1, flexDirection: 'column', minHeight: 0 }}>
           <SingleEditorView editor={editor} entries={entries} onNavigateWikilink={onNavigateWikilink} onChange={onEditorChange} vaultPath={vaultPath} isDarkTheme={isDarkTheme} />
         </div>
       )}
-      {isLoadingNewTab && !diffMode && <EditorLoadingSkeleton />}
+      {isLoadingNewTab && showEditor && <EditorLoadingSkeleton />}
     </div>
   )
 }
diff --git a/src/components/RawEditorView.test.tsx b/src/components/RawEditorView.test.tsx
new file mode 100644
index 00000000..4d805d8d
--- /dev/null
+++ b/src/components/RawEditorView.test.tsx
@@ -0,0 +1,143 @@
+import { describe, it, expect, vi } from 'vitest'
+import { render, screen, fireEvent, act } from '@testing-library/react'
+import { RawEditorView } from './RawEditorView'
+import { extractWikilinkQuery, detectYamlError } from '../utils/rawEditorUtils'
+
+// Minimal VaultEntry factory
+function entry(title: string, path = `/vault/note/${title}.md`) {
+  return {
+    path, filename: `${title}.md`, title, isA: 'Note',
+    aliases: [], belongsTo: [], relatedTo: [], status: null, owner: null,
+    cadence: null, archived: false, trashed: false, trashedAt: null,
+    modifiedAt: null, createdAt: null, fileSize: 0, snippet: '', wordCount: 0,
+    relationships: {}, icon: null, color: null, order: null,
+    sidebarLabel: null, template: null, outgoingLinks: [],
+  }
+}
+
+const defaultProps = {
+  content: '---\ntitle: My Note\n---\n\n# My Note\n\nSome content.',
+  path: '/vault/note/my-note.md',
+  entries: [entry('Project Alpha'), entry('Meeting Notes')],
+  onContentChange: vi.fn(),
+  onSave: vi.fn(),
+}
+
+describe('extractWikilinkQuery', () => {
+  it('returns null when no [[ trigger', () => {
+    expect(extractWikilinkQuery('hello world', 5)).toBeNull()
+  })
+
+  it('returns empty string immediately after [[', () => {
+    const text = 'see [['
+    expect(extractWikilinkQuery(text, text.length)).toBe('')
+  })
+
+  it('returns query after [[', () => {
+    const text = 'see [[Proj'
+    expect(extractWikilinkQuery(text, text.length)).toBe('Proj')
+  })
+
+  it('returns null when ]] closes the link', () => {
+    const text = '[[Proj]]'
+    expect(extractWikilinkQuery(text, text.length)).toBeNull()
+  })
+
+  it('returns null when newline is in query', () => {
+    const text = '[[Proj\ncontinued'
+    expect(extractWikilinkQuery(text, text.length)).toBeNull()
+  })
+
+  it('handles cursor before end of text', () => {
+    // cursor at 6 = after "[[Proj" (before the space)
+    const text = '[[Proj after'
+    expect(extractWikilinkQuery(text, 6)).toBe('Proj')
+  })
+})
+
+describe('detectYamlError', () => {
+  it('returns null for content without frontmatter', () => {
+    expect(detectYamlError('# Title\n\nSome content.')).toBeNull()
+  })
+
+  it('returns null for valid frontmatter', () => {
+    expect(detectYamlError('---\ntitle: My Note\n---\n\n# Title')).toBeNull()
+  })
+
+  it('returns error for unclosed frontmatter', () => {
+    const error = detectYamlError('---\ntitle: My Note\n\n# Title')
+    expect(error).toContain('Unclosed frontmatter')
+  })
+
+  it('returns error for tab indentation in frontmatter', () => {
+    const error = detectYamlError('---\n\ttitle: My Note\n---\n')
+    expect(error).toContain('tab indentation')
+  })
+
+  it('returns null for content not starting with ---', () => {
+    expect(detectYamlError('Not frontmatter')).toBeNull()
+  })
+})
+
+describe('RawEditorView', () => {
+  it('renders textarea with the provided content', () => {
+    render(<RawEditorView {...defaultProps} />)
+    const textarea = screen.getByTestId('raw-editor-textarea')
+    expect(textarea).toBeInTheDocument()
+    expect((textarea as HTMLTextAreaElement).value).toBe(defaultProps.content)
+  })
+
+  it('calls onContentChange when user types (debounced)', async () => {
+    vi.useFakeTimers()
+    const onContentChange = vi.fn()
+    render(<RawEditorView {...defaultProps} onContentChange={onContentChange} />)
+    const textarea = screen.getByTestId('raw-editor-textarea')
+
+    fireEvent.change(textarea, { target: { value: '---\ntitle: Changed\n---\n\n# Changed' } })
+
+    // Should not be called immediately
+    expect(onContentChange).not.toHaveBeenCalled()
+
+    // After debounce
+    await act(async () => { vi.advanceTimersByTime(600) })
+    expect(onContentChange).toHaveBeenCalledWith(
+      defaultProps.path,
+      '---\ntitle: Changed\n---\n\n# Changed'
+    )
+
+    vi.useRealTimers()
+  })
+
+  it('shows YAML error banner for unclosed frontmatter', () => {
+    render(<RawEditorView {...defaultProps} content="---\ntitle: Bad\n\n# Title" />)
+    expect(screen.getByTestId('raw-editor-yaml-error')).toBeInTheDocument()
+    expect(screen.getByTestId('raw-editor-yaml-error')).toHaveTextContent('Unclosed frontmatter')
+  })
+
+  it('does not show YAML error for valid content', () => {
+    render(<RawEditorView {...defaultProps} />)
+    expect(screen.queryByTestId('raw-editor-yaml-error')).not.toBeInTheDocument()
+  })
+
+  it('calls onSave when Cmd+S is pressed', () => {
+    const onSave = vi.fn()
+    render(<RawEditorView {...defaultProps} onSave={onSave} />)
+    const textarea = screen.getByTestId('raw-editor-textarea')
+    fireEvent.keyDown(textarea, { key: 's', metaKey: true })
+    expect(onSave).toHaveBeenCalledOnce()
+  })
+
+  it('calls onSave when Ctrl+S is pressed', () => {
+    const onSave = vi.fn()
+    render(<RawEditorView {...defaultProps} onSave={onSave} />)
+    const textarea = screen.getByTestId('raw-editor-textarea')
+    fireEvent.keyDown(textarea, { key: 's', ctrlKey: true })
+    expect(onSave).toHaveBeenCalledOnce()
+  })
+
+  it('has monospaced font family applied', () => {
+    render(<RawEditorView {...defaultProps} />)
+    const textarea = screen.getByTestId('raw-editor-textarea') as HTMLTextAreaElement
+    expect(textarea.style.fontFamily).toContain('monospace')
+  })
+})
diff --git a/src/components/RawEditorView.tsx b/src/components/RawEditorView.tsx
new file mode 100644
index 00000000..40c1e659
--- /dev/null
+++ b/src/components/RawEditorView.tsx
@@ -0,0 +1,276 @@
+import { useRef, useState, useCallback, useEffect, useMemo } from 'react'
+import { preFilterWikilinks, deduplicateByPath, MIN_QUERY_LENGTH } from '../utils/wikilinkSuggestions'
+import { attachClickHandlers, enrichSuggestionItems } from '../utils/suggestionEnrichment'
+import { buildTypeEntryMap } from '../utils/typeColors'
+import { NoteSearchList } from './NoteSearchList'
+import { extractWikilinkQuery, detectYamlError } from '../utils/rawEditorUtils'
+import type { WikilinkSuggestionItem } from './WikilinkSuggestionMenu'
+import type { VaultEntry } from '../types'
+
+/** Get approximate pixel coordinates of the cursor in a textarea. */
+function getCaretCoordinates(
+  textarea: HTMLTextAreaElement,
+  position: number,
+): { top: number; left: number } {
+  const mirror = document.createElement('div')
+  const style = getComputedStyle(textarea)
+
+  const props = [
+    'boxSizing', 'width', 'borderTopWidth', 'borderRightWidth',
+    'borderBottomWidth', 'borderLeftWidth',
+    'paddingTop', 'paddingRight', 'paddingBottom', 'paddingLeft',
+    'fontStyle', 'fontVariant', 'fontWeight', 'fontSize', 'lineHeight',
+    'fontFamily', 'textTransform', 'letterSpacing', 'wordSpacing',
+  ] as const
+  for (const prop of props) {
+    (mirror.style as unknown as Record<string, string>)[prop] = style[prop] as string
+  }
+  mirror.style.position = 'absolute'
+  mirror.style.visibility = 'hidden'
+  mirror.style.top = '0'
+  mirror.style.left = '-9999px'
+  mirror.style.whiteSpace = 'pre-wrap'
+  mirror.style.wordWrap = 'break-word'
+  mirror.style.overflow = 'hidden'
+
+  mirror.textContent = textarea.value.slice(0, position)
+  const caret = document.createElement('span')
+  caret.textContent = '\u200B'
+  mirror.appendChild(caret)
+  document.body.appendChild(mirror)
+
+  const caretRect = caret.getBoundingClientRect()
+  const mirrorRect = mirror.getBoundingClientRect()
+  document.body.removeChild(mirror)
+
+  const textareaRect = textarea.getBoundingClientRect()
+  return {
+    top: caretRect.top - mirrorRect.top + textareaRect.top - textarea.scrollTop,
+    left: caretRect.left - mirrorRect.left + textareaRect.left,
+  }
+}
+
+interface AutocompleteState {
+  caretTop: number
+  caretLeft: number
+  selectedIndex: number
+  items: WikilinkSuggestionItem[]
+}
+
+interface RawEditorViewProps {
+  content: string
+  path: string
+  entries: VaultEntry[]
+  onContentChange: (path: string, content: string) => void
+  onSave: () => void
+}
+
+const FONT_FAMILY = '"Berkeley Mono", "JetBrains Mono", "Fira Mono", ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace'
+const DEBOUNCE_MS = 500
+const DROPDOWN_MAX_HEIGHT = 200
+
+export function RawEditorView({ content, path, entries, onContentChange, onSave }: RawEditorViewProps) {
+  const textareaRef = useRef<HTMLTextAreaElement>(null)
+  const debounceRef = useRef<ReturnType<typeof setTimeout> | null>(null)
+  const pathRef = useRef(path)
+  const onContentChangeRef = useRef(onContentChange)
+  const onSaveRef = useRef(onSave)
+  useEffect(() => { pathRef.current = path }, [path])
+  useEffect(() => { onContentChangeRef.current = onContentChange }, [onContentChange])
+  useEffect(() => { onSaveRef.current = onSave }, [onSave])
+
+  const [value, setValue] = useState(content)
+  const [autocomplete, setAutocomplete] = useState<AutocompleteState | null>(null)
+  const [yamlError, setYamlError] = useState<string | null>(() => detectYamlError(content))
+  // NOTE: tab-switch reset is handled via key={path} in the parent (EditorContent)
+
+  const typeEntryMap = useMemo(() => buildTypeEntryMap(entries), [entries])
+
+  const baseItems = useMemo(
+    () => deduplicateByPath(entries.map(entry => ({
+      title: entry.title,
+      aliases: [...new Set([entry.filename.replace(/\.md$/, ''), ...entry.aliases])],
+      group: entry.isA || 'Note',
+      entryTitle: entry.title,
+      path: entry.path,
+    }))),
+    [entries],
+  )
+
+  /** Insert [[entryTitle]] at the current [[ trigger position */
+  const insertWikilink = useCallback((entryTitle: string) => {
+    const textarea = textareaRef.current
+    if (!textarea) return
+
+    const cursor = textarea.selectionStart
+    const text = textarea.value
+    const before = text.slice(0, cursor)
+    const triggerIdx = before.lastIndexOf('[[')
+    if (triggerIdx === -1) return
+
+    const after = text.slice(cursor)
+    const newText = `${text.slice(0, triggerIdx)}[[${entryTitle}]]${after}`
+    const newCursor = triggerIdx + entryTitle.length + 4
+
+    setValue(newText)
+    setAutocomplete(null)
+
+    // Flush immediately — autocomplete inserts should not be debounced
+    if (debounceRef.current) clearTimeout(debounceRef.current)
+    debounceRef.current = null
+    onContentChangeRef.current(pathRef.current, newText)
+
+    requestAnimationFrame(() => {
+      if (textareaRef.current) {
+        textareaRef.current.selectionStart = newCursor
+        textareaRef.current.selectionEnd = newCursor
+        textareaRef.current.focus()
+      }
+    })
+  }, [])
+
+  const handleChange = useCallback((e: React.ChangeEvent<HTMLTextAreaElement>) => {
+    const newValue = e.target.value
+    const cursor = e.target.selectionStart ?? 0
+
+    setValue(newValue)
+    setYamlError(detectYamlError(newValue))
+
+    if (debounceRef.current) clearTimeout(debounceRef.current)
+    debounceRef.current = setTimeout(() => {
+      onContentChangeRef.current(pathRef.current, newValue)
+    }, DEBOUNCE_MS)
+
+    const query = extractWikilinkQuery(newValue, cursor)
+    if (query === null || query.length < MIN_QUERY_LENGTH) {
+      setAutocomplete(null)
+      return
+    }
+
+    const textarea = e.target
+    const coords = getCaretCoordinates(textarea, cursor)
+    const candidates = preFilterWikilinks(baseItems, query)
+    const withHandlers = attachClickHandlers(candidates, insertWikilink)
+    const items = enrichSuggestionItems(withHandlers, query, typeEntryMap)
+
+    setAutocomplete({ caretTop: coords.top, caretLeft: coords.left, selectedIndex: 0, items })
+  }, [baseItems, typeEntryMap, insertWikilink])
+
+  const handleKeyDown = useCallback((e: React.KeyboardEvent<HTMLTextAreaElement>) => {
+    // Save shortcut
+    if ((e.metaKey || e.ctrlKey) && e.key === 's') {
+      e.preventDefault()
+      if (debounceRef.current) {
+        clearTimeout(debounceRef.current)
+        debounceRef.current = null
+        onContentChangeRef.current(pathRef.current, textareaRef.current?.value ?? '')
+      }
+      onSaveRef.current()
+      return
+    }
+
+    if (!autocomplete) return
+
+    if (e.key === 'ArrowDown') {
+      e.preventDefault()
+      setAutocomplete(prev => prev
+        ? { ...prev, selectedIndex: Math.min(prev.selectedIndex + 1, prev.items.length - 1) }
+        : null)
+    } else if (e.key === 'ArrowUp') {
+      e.preventDefault()
+      setAutocomplete(prev => prev
+        ? { ...prev, selectedIndex: Math.max(prev.selectedIndex - 1, 0) }
+        : null)
+    } else if (e.key === 'Enter') {
+      e.preventDefault()
+      const item = autocomplete.items[autocomplete.selectedIndex]
+      if (item) insertWikilink(item.entryTitle ?? item.title)
+    } else if (e.key === 'Escape') {
+      e.preventDefault()
+      setAutocomplete(null)
+    }
+  }, [autocomplete, insertWikilink])
+
+  const closeAutocomplete = useCallback(() => setAutocomplete(null), [])
+
+  // Flush pending debounce on unmount (e.g. switching tabs while in raw mode)
+  useEffect(() => {
+    const pendingPath = pathRef
+    const pendingChange = onContentChangeRef
+    const pendingDebounce = debounceRef
+    const pendingTextarea = textareaRef
+    return () => {
+      if (pendingDebounce.current) {
+        clearTimeout(pendingDebounce.current)
+        pendingChange.current(pendingPath.current, pendingTextarea.current?.value ?? '')
+      }
+    }
+  }, [])
+
+  const dropdownBelow = autocomplete
+    ? autocomplete.caretTop + 20 + DROPDOWN_MAX_HEIGHT <= window.innerHeight
+    : true
+  const dropdownTop = autocomplete
+    ? (dropdownBelow ? autocomplete.caretTop + 20 : autocomplete.caretTop - DROPDOWN_MAX_HEIGHT - 4)
+    : 0
+  const dropdownLeft = autocomplete
+    ? Math.min(autocomplete.caretLeft, window.innerWidth - 260)
+    : 0
+
+  return (
+    <div className="flex flex-1 flex-col min-h-0 relative" style={{ background: 'var(--background)' }}>
+      {yamlError && (
+        <div
+          className="flex items-center gap-2 px-4 py-2 text-xs border-b shrink-0"
+          style={{ background: '#fef3c7', borderColor: '#d97706', color: '#92400e' }}
+          role="alert"
+          data-testid="raw-editor-yaml-error"
+        >
+          <span style={{ fontWeight: 600 }}>YAML error:</span>
+          <span>{yamlError}</span>
+        </div>
+      )}
+      <textarea
+        ref={textareaRef}
+        value={value}
+        onChange={handleChange}
+        onKeyDown={handleKeyDown}
+        onClick={closeAutocomplete}
+        className="flex-1 resize-none border-none outline-none p-8"
+        style={{
+          fontFamily: FONT_FAMILY,
+          fontSize: 13,
+          lineHeight: 1.6,
+          background: 'var(--background)',
+          color: 'var(--foreground)',
+          tabSize: 2,
+          minHeight: 0,
+        }}
+        spellCheck={false}
+        aria-label="Raw editor"
+        data-testid="raw-editor-textarea"
+      />
+      {autocomplete && autocomplete.items.length > 0 && (
+        <div
+          className="fixed z-50 min-w-64 max-w-xs rounded-md border shadow-lg overflow-auto"
+          style={{
+            top: dropdownTop,
+            left: dropdownLeft,
+            maxHeight: DROPDOWN_MAX_HEIGHT,
+            background: 'var(--popover)',
+            borderColor: 'var(--border)',
+          }}
+          data-testid="raw-editor-wikilink-dropdown"
+        >
+          <NoteSearchList
+            items={autocomplete.items}
+            selectedIndex={autocomplete.selectedIndex}
+            getItemKey={(item, i) => `${item.title}-${item.path ?? i}`}
+            onItemClick={(item) => insertWikilink(item.entryTitle ?? item.title)}
+            onItemHover={(i) => setAutocomplete(prev => prev ? { ...prev, selectedIndex: i } : null)}
+          />
+        </div>
+      )}
+    </div>
+  )
+}
diff --git a/src/hooks/useAppCommands.ts b/src/hooks/useAppCommands.ts
index 0d2bbcb2..51be1e07 100644
--- a/src/hooks/useAppCommands.ts
+++ b/src/hooks/useAppCommands.ts
@@ -33,6 +33,7 @@ interface AppCommandsConfig {
   onCommitPush: () => void
   onSetViewMode: (mode: ViewMode) => void
   onToggleInspector: () => void
+  onToggleRawEditor?: () => void
   onZoomIn: () => void
   onZoomOut: () => void
   onZoomReset: () => void
@@ -129,6 +130,7 @@ export function useAppCommands(config: AppCommandsConfig): CommandAction[] {
     onCommitPush: config.onCommitPush,
     onSetViewMode: config.onSetViewMode,
     onToggleInspector: config.onToggleInspector,
+    onToggleRawEditor: config.onToggleRawEditor,
     onZoomIn: config.onZoomIn,
     onZoomOut: config.onZoomOut,
     onZoomReset: config.onZoomReset,
diff --git a/src/hooks/useCommandRegistry.test.ts b/src/hooks/useCommandRegistry.test.ts
index e0d60ff4..1f3b2d34 100644
--- a/src/hooks/useCommandRegistry.test.ts
+++ b/src/hooks/useCommandRegistry.test.ts
@@ -156,6 +156,36 @@ describe('useCommandRegistry', () => {
     expect(onTrashNote).toHaveBeenCalledWith('/vault/note/test.md')
   })
 
+  it('has toggle-raw-editor command in View group', () => {
+    const { result } = renderHook(() => useCommandRegistry(makeConfig()))
+    const cmd = result.current.find(c => c.id === 'toggle-raw-editor')
+    expect(cmd).toBeDefined()
+    expect(cmd!.group).toBe('View')
+  })
+
+  it('disables toggle-raw-editor when no note is open', () => {
+    const { result } = renderHook(() => useCommandRegistry(makeConfig({ activeTabPath: null })))
+    const cmd = result.current.find(c => c.id === 'toggle-raw-editor')
+    expect(cmd!.enabled).toBe(false)
+  })
+
+  it('enables toggle-raw-editor when a note is open', () => {
+    const { result } = renderHook(() =>
+      useCommandRegistry(makeConfig({ activeTabPath: '/vault/note/test.md' })),
+    )
+    const cmd = result.current.find(c => c.id === 'toggle-raw-editor')
+    expect(cmd!.enabled).toBe(true)
+  })
+
+  it('calls onToggleRawEditor when toggle-raw-editor executes', () => {
+    const onToggleRawEditor = vi.fn()
+    const { result } = renderHook(() =>
+      useCommandRegistry(makeConfig({ activeTabPath: '/vault/note/test.md', onToggleRawEditor })),
+    )
+    result.current.find(c => c.id === 'toggle-raw-editor')!.execute()
+    expect(onToggleRawEditor).toHaveBeenCalledOnce()
+  })
+
   it('disables commit when no modified files', () => {
     const { result } = renderHook(() => useCommandRegistry(makeConfig({ modifiedCount: 0 })))
     expect(result.current.find(c => c.id === 'commit-push')!.enabled).toBe(false)
diff --git a/src/hooks/useCommandRegistry.ts b/src/hooks/useCommandRegistry.ts
index 6a394ce8..fc3f8d26 100644
--- a/src/hooks/useCommandRegistry.ts
+++ b/src/hooks/useCommandRegistry.ts
@@ -32,6 +32,7 @@ interface CommandRegistryConfig {
   onCommitPush: () => void
   onSetViewMode: (mode: ViewMode) => void
   onToggleInspector: () => void
+  onToggleRawEditor?: () => void
   onToggleAIChat?: () => void
   onZoomIn: () => void
   onZoomOut: () => void
@@ -102,6 +103,30 @@ export function buildTypeCommands(
   })
 }
 
+export function buildViewCommands(
+  hasActiveNote: boolean,
+  onSetViewMode: (mode: ViewMode) => void,
+  onToggleInspector: () => void,
+  onToggleRawEditor: (() => void) | undefined,
+  onToggleAIChat: (() => void) | undefined,
+  zoomLevel: number,
+  onZoomIn: () => void,
+  onZoomOut: () => void,
+  onZoomReset: () => void,
+): CommandAction[] {
+  return [
+    { id: 'view-editor', label: 'Editor Only', group: 'View', shortcut: '⌘1', keywords: ['layout', 'focus'], enabled: true, execute: () => onSetViewMode('editor-only') },
+    { id: 'view-editor-list', label: 'Editor + Note List', group: 'View', shortcut: '⌘2', keywords: ['layout'], enabled: true, execute: () => onSetViewMode('editor-list') },
+    { id: 'view-all', label: 'Full Layout', group: 'View', shortcut: '⌘3', keywords: ['layout', 'sidebar'], enabled: true, execute: () => onSetViewMode('all') },
+    { id: 'toggle-inspector', label: 'Toggle Inspector', group: 'View', keywords: ['properties', 'panel', 'right'], enabled: true, execute: onToggleInspector },
+    { id: 'toggle-raw-editor', label: 'Toggle Raw Editor', group: 'View', keywords: ['raw', 'source', 'markdown', 'frontmatter', 'code', 'textarea'], enabled: hasActiveNote, execute: () => onToggleRawEditor?.() },
+    { id: 'toggle-ai-chat', label: 'Toggle AI Chat', group: 'View', shortcut: '⌘I', keywords: ['ai', 'agent', 'chat', 'assistant', 'contextual'], enabled: true, execute: () => onToggleAIChat?.() },
+    { id: 'zoom-in', label: `Zoom In (${zoomLevel}%)`, group: 'View', shortcut: '⌘=', keywords: ['zoom', 'bigger', 'larger', 'scale'], enabled: zoomLevel < 150, execute: onZoomIn },
+    { id: 'zoom-out', label: `Zoom Out (${zoomLevel}%)`, group: 'View', shortcut: '⌘-', keywords: ['zoom', 'smaller', 'scale'], enabled: zoomLevel > 80, execute: onZoomOut },
+    { id: 'zoom-reset', label: 'Reset Zoom', group: 'View', shortcut: '⌘0', keywords: ['zoom', 'actual', 'default', '100'], enabled: zoomLevel !== 100, execute: onZoomReset },
+  ]
+}
+
 export function buildThemeCommands(
   themes: ThemeFile[] | undefined,
   activeThemeId: string | null | undefined,
@@ -130,7 +155,7 @@ export function useCommandRegistry(config: CommandRegistryConfig): CommandAction
     activeTabPath, entries, modifiedCount,
     onQuickOpen, onCreateNote, onCreateNoteOfType, onSave, onOpenSettings,
     onTrashNote, onRestoreNote, onArchiveNote, onUnarchiveNote,
-    onCommitPush, onSetViewMode, onToggleInspector, onToggleAIChat, onOpenVault,
+    onCommitPush, onSetViewMode, onToggleInspector, onToggleRawEditor, onToggleAIChat, onOpenVault,
     onZoomIn, onZoomOut, onZoomReset, zoomLevel,
     onSelect, onOpenDailyNote, onCloseTab,
     onGoBack, onGoForward, canGoBack, canGoForward,
@@ -181,14 +206,7 @@ export function useCommandRegistry(config: CommandRegistryConfig): CommandAction
       { id: 'view-changes', label: 'View Pending Changes', group: 'Git', keywords: ['modified', 'diff'], enabled: true, execute: () => onSelect({ kind: 'filter', filter: 'changes' }) },
 
       // View
-      { id: 'view-editor', label: 'Editor Only', group: 'View', shortcut: '⌘1', keywords: ['layout', 'focus'], enabled: true, execute: () => onSetViewMode('editor-only') },
-      { id: 'view-editor-list', label: 'Editor + Note List', group: 'View', shortcut: '⌘2', keywords: ['layout'], enabled: true, execute: () => onSetViewMode('editor-list') },
-      { id: 'view-all', label: 'Full Layout', group: 'View', shortcut: '⌘3', keywords: ['layout', 'sidebar'], enabled: true, execute: () => onSetViewMode('all') },
-      { id: 'toggle-inspector', label: 'Toggle Inspector', group: 'View', keywords: ['properties', 'panel', 'right'], enabled: true, execute: onToggleInspector },
-      { id: 'toggle-ai-chat', label: 'Toggle AI Chat', group: 'View', shortcut: '⌘I', keywords: ['ai', 'agent', 'chat', 'assistant', 'contextual'], enabled: true, execute: () => onToggleAIChat?.() },
-      { id: 'zoom-in', label: `Zoom In (${zoomLevel}%)`, group: 'View', shortcut: '⌘=', keywords: ['zoom', 'bigger', 'larger', 'scale'], enabled: zoomLevel < 150, execute: onZoomIn },
-      { id: 'zoom-out', label: `Zoom Out (${zoomLevel}%)`, group: 'View', shortcut: '⌘-', keywords: ['zoom', 'smaller', 'scale'], enabled: zoomLevel > 80, execute: onZoomOut },
-      { id: 'zoom-reset', label: 'Reset Zoom', group: 'View', shortcut: '⌘0', keywords: ['zoom', 'actual', 'default', '100'], enabled: zoomLevel !== 100, execute: onZoomReset },
+      ...buildViewCommands(hasActiveNote, onSetViewMode, onToggleInspector, onToggleRawEditor, onToggleAIChat, zoomLevel, onZoomIn, onZoomOut, onZoomReset),
 
       // Appearance
       ...buildThemeCommands(themes, activeThemeId, onSwitchTheme, onCreateTheme),
@@ -206,7 +224,7 @@ export function useCommandRegistry(config: CommandRegistryConfig): CommandAction
     hasActiveNote, activeTabPath, isArchived, isTrashed, modifiedCount,
     onQuickOpen, onCreateNote, onCreateNoteOfType, onSave, onOpenSettings,
     onTrashNote, onRestoreNote, onArchiveNote, onUnarchiveNote,
-    onCommitPush, onSetViewMode, onToggleInspector, onToggleAIChat, onOpenVault,
+    onCommitPush, onSetViewMode, onToggleInspector, onToggleRawEditor, onToggleAIChat, onOpenVault,
     onZoomIn, onZoomOut, onZoomReset, zoomLevel,
     onSelect, onOpenDailyNote, onCloseTab,
     onGoBack, onGoForward, canGoBack, canGoForward,
diff --git a/src/hooks/useRawMode.test.ts b/src/hooks/useRawMode.test.ts
new file mode 100644
index 00000000..6b207293
--- /dev/null
+++ b/src/hooks/useRawMode.test.ts
@@ -0,0 +1,87 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { renderHook, act } from '@testing-library/react'
+import { useRawMode } from './useRawMode'
+
+describe('useRawMode', () => {
+  let onFlushPending: ReturnType<typeof vi.fn>
+
+  beforeEach(() => {
+    onFlushPending = vi.fn().mockResolvedValue(true)
+  })
+
+  function renderRawHook(activeTabPath: string | null = '/note.md') {
+    return renderHook(
+      ({ path }) => useRawMode({ activeTabPath: path, onFlushPending }),
+      { initialProps: { path: activeTabPath } },
+    )
+  }
+
+  it('starts with raw mode off', () => {
+    const { result } = renderRawHook()
+    expect(result.current.rawMode).toBe(false)
+  })
+
+  it('toggles raw mode on', async () => {
+    const { result } = renderRawHook()
+
+    await act(async () => { await result.current.handleToggleRaw() })
+
+    expect(result.current.rawMode).toBe(true)
+  })
+
+  it('flushes pending edits when activating raw mode', async () => {
+    const { result } = renderRawHook()
+
+    await act(async () => { await result.current.handleToggleRaw() })
+
+    expect(onFlushPending).toHaveBeenCalledOnce()
+  })
+
+  it('does not flush pending edits when deactivating raw mode', async () => {
+    const { result } = renderRawHook()
+
+    await act(async () => { await result.current.handleToggleRaw() })
+    onFlushPending.mockClear()
+
+    await act(async () => { await result.current.handleToggleRaw() })
+
+    expect(onFlushPending).not.toHaveBeenCalled()
+  })
+
+  it('toggles raw mode off when already on', async () => {
+    const { result } = renderRawHook()
+
+    await act(async () => { await result.current.handleToggleRaw() })
+    expect(result.current.rawMode).toBe(true)
+
+    await act(async () => { await result.current.handleToggleRaw() })
+    expect(result.current.rawMode).toBe(false)
+  })
+
+  it('resets raw mode when activeTabPath changes', async () => {
+    const { result, rerender } = renderRawHook('/note-a.md')
+
+    await act(async () => { await result.current.handleToggleRaw() })
+    expect(result.current.rawMode).toBe(true)
+
+    rerender({ path: '/note-b.md' })
+    expect(result.current.rawMode).toBe(false)
+  })
+
+  it('works without onFlushPending callback', async () => {
+    const { result } = renderHook(() => useRawMode({ activeTabPath: '/note.md' }))
+
+    await act(async () => { await result.current.handleToggleRaw() })
+
+    expect(result.current.rawMode).toBe(true)
+  })
+
+  it('does not activate raw mode when activeTabPath is null', async () => {
+    const { result } = renderRawHook(null)
+
+    await act(async () => { await result.current.handleToggleRaw() })
+
+    // Cannot activate raw mode without an active tab path
+    expect(result.current.rawMode).toBe(false)
+  })
+})
diff --git a/src/hooks/useRawMode.ts b/src/hooks/useRawMode.ts
new file mode 100644
index 00000000..21e37276
--- /dev/null
+++ b/src/hooks/useRawMode.ts
@@ -0,0 +1,29 @@
+import { useState, useCallback } from 'react'
+
+interface UseRawModeParams {
+  activeTabPath: string | null
+  /** Flush pending WYSIWYG edits to disk before entering raw mode. */
+  onFlushPending?: () => Promise<boolean>
+}
+
+/**
+ * Manages raw editor mode state.
+ * Raw mode is automatically inactive when the active tab changes,
+ * because rawMode is derived from whether the stored path matches the current tab.
+ */
+export function useRawMode({ activeTabPath, onFlushPending }: UseRawModeParams) {
+  // Track which path has raw mode active — automatically deactivates on tab switch
+  const [rawActivePath, setRawActivePath] = useState<string | null>(null)
+  const rawMode = rawActivePath !== null && rawActivePath === activeTabPath
+
+  const handleToggleRaw = useCallback(async () => {
+    if (rawMode) {
+      setRawActivePath(null)
+    } else {
+      await onFlushPending?.()
+      setRawActivePath(activeTabPath)
+    }
+  }, [rawMode, activeTabPath, onFlushPending])
+
+  return { rawMode, handleToggleRaw }
+}
diff --git a/src/utils/rawEditorUtils.ts b/src/utils/rawEditorUtils.ts
new file mode 100644
index 00000000..7f31e110
--- /dev/null
+++ b/src/utils/rawEditorUtils.ts
@@ -0,0 +1,21 @@
+/** Extract the wikilink query that the user is currently typing after [[ */
+export function extractWikilinkQuery(text: string, cursor: number): string | null {
+  const before = text.slice(0, cursor)
+  const triggerIdx = before.lastIndexOf('[[')
+  if (triggerIdx === -1) return null
+  const afterTrigger = before.slice(triggerIdx + 2)
+  // Don't trigger if the query contains ] (already closed) or a newline
+  if (afterTrigger.includes(']') || afterTrigger.includes('\n')) return null
+  return afterTrigger
+}
+
+/** Basic YAML frontmatter structural checks. */
+export function detectYamlError(content: string): string | null {
+  if (!content.startsWith('---')) return null
+  const rest = content.slice(3)
+  const closeIdx = rest.search(/\n---(\n|$)/)
+  if (closeIdx === -1) return 'Unclosed frontmatter block — add a closing --- line'
+  const block = rest.slice(0, closeIdx)
+  if (/^\t/m.test(block)) return 'YAML frontmatter contains tab indentation — use spaces'
+  return null
+}